... detailed understanding of the effect of additives is essen-tial for obtaining the best performance from lead–acid batteries. In previous work, it was found that quinone structures in ligninderivatives, ... Y.S. Lin, C.W. Dence, Methods in Lignin Chemistry, Springer, Berlin, Ger-many, 1992, p. 222.Journal of Power Sources 158 (2006) 1106–1109Density and hardness of negative pastes of lead–acid batteries ... hardness of a paste containing anthraquinoneare almost the same as one containing anthracene. By contrast, the two parameters are very different for pastes containing 1,2-naphthoquinone-4-sulfonic...